#include <mach/mach.h>
#include <mach/cthreads.h>
#include <objc/thr.h>
#include "runtime.h"
static int
__mach_get_max_thread_priority (cthread_t t, int *base)
{
thread_t threadP;
kern_return_t error;
struct thread_sched_info info;
unsigned int info_count=THREAD_SCHED_INFO_COUNT;
if (t == NULL)
return -1;
threadP = cthread_thread (t);
error = thread_info (threadP, THREAD_SCHED_INFO,
(thread_info_t) &info, &info_count);
if (error != KERN_SUCCESS)
return -1;
if (base != NULL)
*base = info.base_priority;
return info.max_priority;
}
int
__objc_init_thread_system (void)
{
return 0;
}
int
__objc_close_thread_system (void)
{
return 0;
}
objc_thread_t
__objc_thread_detach (void (*func) (void *arg), void *arg)
{
objc_thread_t thread_id;
cthread_t new_thread_handle;
new_thread_handle = cthread_fork ((cthread_fn_t) func, arg);
if (new_thread_handle)
{
thread_id = *(objc_thread_t *) &new_thread_handle;
cthread_detach (new_thread_handle);
}
else
thread_id = NULL;
return thread_id;
}
int
__objc_thread_set_priority (int priority)
{
objc_thread_t *t = objc_thread_id ();
cthread_t cT = (cthread_t) t;
int maxPriority = __mach_get_max_thread_priority (cT, NULL);
int sys_priority = 0;
if (maxPriority == -1)
return -1;
switch (priority)
{
case OBJC_THREAD_INTERACTIVE_PRIORITY:
sys_priority = maxPriority;
break;
case OBJC_THREAD_BACKGROUND_PRIORITY:
sys_priority = (maxPriority * 2) / 3;
break;
case OBJC_THREAD_LOW_PRIORITY:
sys_priority = maxPriority / 3;
break;
default:
return -1;
}
if (sys_priority == 0)
return -1;
if (cthread_priority (cT, sys_priority, 0) == KERN_SUCCESS)
return 0;
else
return -1;
}
int
__objc_thread_get_priority (void)
{
objc_thread_t *t = objc_thread_id ();
cthread_t cT = (cthread_t) t;
int basePriority;
int maxPriority;
int sys_priority = 0;
int interactiveT, backgroundT, lowT;
maxPriority = __mach_get_max_thread_priority (cT, &basePriority);
if (maxPriority == -1)
return -1;
if (basePriority > ( (maxPriority * 2) / 3))
return OBJC_THREAD_INTERACTIVE_PRIORITY;
if (basePriority > ( maxPriority / 3))
return OBJC_THREAD_BACKGROUND_PRIORITY;
return OBJC_THREAD_LOW_PRIORITY;
}
void
__objc_thread_yield (void)
{
cthread_yield ();
}
int
__objc_thread_exit (void)
{
cthread_exit (&__objc_thread_exit_status);
return -1;
}
objc_thread_t
__objc_thread_id (void)
{
cthread_t self = cthread_self ();
return *(objc_thread_t *) &self;
}
int
__objc_thread_set_data (void *value)
{
cthread_set_data (cthread_self (), (any_t) value);
return 0;
}
void *
__objc_thread_get_data (void)
{
return (void *) cthread_data (cthread_self ());
}
int
__objc_mutex_allocate (objc_mutex_t mutex)
{
int err = 0;
mutex->backend = objc_malloc (sizeof (struct mutex));
err = mutex_init ((mutex_t) (mutex->backend));
if (err != 0)
{
objc_free (mutex->backend);
return -1;
}
else
return 0;
}
int
__objc_mutex_deallocate (objc_mutex_t mutex)
{
mutex_clear ((mutex_t) (mutex->backend));
objc_free (mutex->backend);
mutex->backend = NULL;
return 0;
}
int
__objc_mutex_lock (objc_mutex_t mutex)
{
mutex_lock ((mutex_t) (mutex->backend));
return 0;
}
int
__objc_mutex_trylock (objc_mutex_t mutex)
{
if (mutex_try_lock ((mutex_t) (mutex->backend)) == 0)
return -1;
else
return 0;
}
int
__objc_mutex_unlock (objc_mutex_t mutex)
{
mutex_unlock ((mutex_t) (mutex->backend));
return 0;
}
int
__objc_condition_allocate (objc_condition_t condition)
{
condition->backend = objc_malloc (sizeof (struct condition));
condition_init ((condition_t) (condition->backend));
return 0;
}
int
__objc_condition_deallocate (objc_condition_t condition)
{
condition_clear ((condition_t) (condition->backend));
objc_free (condition->backend);
condition->backend = NULL;
return 0;
}
int
__objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
{
condition_wait ((condition_t) (condition->backend),
(mutex_t) (mutex->backend));
return 0;
}
int
__objc_condition_broadcast (objc_condition_t condition)
{
condition_broadcast ((condition_t) (condition->backend));
return 0;
}
int
__objc_condition_signal (objc_condition_t condition)
{
condition_signal ((condition_t) (condition->backend));
return 0;
}